. >> reporter: president obama promised a resolution. >> we will find out who did this we'll find out why they did this. any responsible individuals, any responsible groups will feel the full weight of justice. >> reporter: fox news and investigators are talking to a saudi man, but he is not being called a suspect. there are not many leads. >> what i can assure you is this is a very thorough and active and fluid ongoing investigation. >> reporter: in fact, late tonight massachusetts state police confirmed they served a search warrant related to the bombing in the boston suburb of revere but they would not give any details. tonight they announced they are making progress. >> we heard conflicting reports of other bombing being found and being disarmed. what have you heard about this. >> reporter: earlier tonight there was word of two the bombs found. but there's questions about whether they were truly unexploded. they may have had to detonate some to clear the situation. >>> and there's no word on who is responsible, or whether it was a lone wolf. >>> the virginia tech massacre also occ